LG intellowasher not responding to input instruction?

i got an lg intellowasher7.2KG model WD-14126. When i plug it and put it on,the led lights on the display come on in one second en it makes a beep sound after that it goes off.when i try to press on/off button every thing is completely silent but when i open the back panel i saw one led light on the main pc board on.i cleaned the water pump.ofcourse i did find a coin they.does the machine needs reset fuction. how do i do that